Change Details

tracking ticket to improve icinga performance, for obvious reasons the biggest improvements can be obtained by tweaking the icinga active checks. the machine hosting icinga (neon) routinely suffers from high load, occasionally icinga children won't cleanup their children leaving behind zombies and eventually swapping. http://ganglia.wikimedia.org/latest/?r=hour&cs=&ce=&m=cpu_report&c=Miscellaneous+eqiad&h=neon.wikimedia.org&tab=m&vn=&hide-hf=false&mc=2&z=medium&metric_group=ALLGROUPS also given the rate at which we spawn checks fork() overhead is significant, thus for example checks that spawn other commands are incredibily inefficient (e.g. check_ssl_cert spawns perl at each invocation)